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dmwrwh.f
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SUBROUTINE DM_WRWH ( iflno, ipos, iheadr, jpos, iret )
C************************************************************************
C* DM_WRWH *
C* *
C* This subroutine writes a row header to a DM file. If the value *
C* for IPOS is 0, the next available location will be used. The *
C* variables contained in the row headers can be determined using *
C* DM_KEYS. *
C* *
C* DM_WRWH ( IFLNO, IPOS, IHEADR, JPOS, IRET ) *
C* *
C* Input parameters: *
C* IFLNO INTEGER File number *
C* IPOS INTEGER Location *
C* IHEADR (*) INTEGER Header array *
C* *
C* Output parameters: *
C* JPOS INTEGER Actual header location *
C* IRET INTEGER Return code *
C* 0 = normal return *
C* -4 = file is not open *
C* -6 = write error *
C* -9 = invalid row *
C* -12 = no more row headers *
C* -13 = no write access *
C** *
C* Log: *
C* M. desJardins/GSFC 6/86 *
C* M. desJardins/NMC 4/91 Add write for files from other machines *
C* M. desJardins/NMC 5/91 Add logical vars for machine types *
C* S. Jacobs/NCEP 2/97 Added check for swapping GVCD *
C* S. Jacobs/NCEP 4/98 Added check for swapping STD2 *
C************************************************************************
INCLUDE 'GEMPRM.PRM'
INCLUDE 'dmcmn.cmn'
C*
INTEGER iheadr (*)
C*
CHARACTER type*4, type2*4
C------------------------------------------------------------------------
jpos = 0
nvstd = 6
C
C* Check that file is open.
C
CALL DM_CHKF ( iflno, iret )
IF ( iret .ne. 0 ) RETURN
C
C* Check that user has write access to file.
C
IF ( .not. wflag (iflno) ) THEN
iret = -13
RETURN
END IF
C
C* Check for valid location.
C
IF ( (ipos .lt. 0) .or. (ipos .gt. krow (iflno)) ) THEN
iret = -9
C
C* Get next location if ipos was set to 0.
C
ELSE IF ( ipos .eq. 0 ) THEN
knt = 1
C
C* Check each header location to see if it is used.
C
DO WHILE ((jpos .eq. 0) .and. (knt .le. krow(iflno)))
IF ( kheadr (0,knt,iflno) .eq. IMISSD ) jpos = knt
knt = knt + 1
END DO
IF ( jpos .eq. 0 ) iret = -12
C
C* Otherwise header location was specified.
C
ELSE
jpos = ipos
C
END IF
C
C* Store header in common.
C
IF ( iret .eq. 0 ) THEN
DO i = 1, krkeys (iflno)
kheadr ( i, jpos, iflno ) = iheadr ( i )
END DO
C
C* Set flag indicating header is used.
C
kheadr ( 0, jpos, iflno ) = - IMISSD
C
C* Write header to file.
C
istart = kprowh (iflno) + (jpos-1) * (krkeys (iflno) + 1)
C
C* If the file was created on a different machine,
C* swap the bytes so that the swap in the write will be
C* nulled.
C
IF ( ( kmachn (iflno) .ne. MTMACH ) .and.
+ ( ( kvmst ( iflno ) .and. ( .not. mvmst ) ) .or.
+ ( mvmst .and. ( .not. kvmst ( iflno ) ) ) ) ) THEN
C
C* Check for STID and STD2.
C
CALL DM_FKEY ( iflno, 'STID', type, loc, ier )
CALL DM_FKEY ( iflno, 'STD2', type2, loc2, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
IF ( loc2 .gt. 0 )
+ ier = MV_SWP4 ( 1, kheadr (loc2,jpos,iflno),
+ kheadr (loc2,jpos,iflno) )
END IF
C
C* Check for STAT.
C
CALL DM_FKEY ( iflno, 'STAT', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
C
C* Check for COUN.
C
CALL DM_FKEY ( iflno, 'COUN', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
C
C* Check for GPM1 which is the start of three words.
C
CALL DM_FKEY ( iflno, 'GPM1', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 3, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
C
C* Check for GVCD. Swap only if the value is greater
C* than the number of standard vertical coordinates.
C
CALL DM_FKEY ( iflno, 'GVCD', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
IF ( kheadr (loc,jpos,iflno) .gt. nvstd ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
END IF
END IF
length = krkeys (iflno) + 1
CALL DM_WINT ( iflno, istart, length,
+ kheadr ( 0, jpos, iflno ), iret )
C
C* On different machines, swap bytes back in common.
C
IF ( ( kmachn (iflno) .ne. MTMACH ) .and.
+ ( ( kvmst ( iflno ) .and. ( .not. mvmst ) ) .or.
+ ( mvmst .and. ( .not. kvmst ( iflno ) ) ) ) ) THEN
C
C* Check for STID and STD2.
C
CALL DM_FKEY ( iflno, 'STID', type, loc, ier )
CALL DM_FKEY ( iflno, 'STD2', type2, loc2, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
IF ( loc2 .gt. 0 )
+ ier = MV_SWP4 ( 1, kheadr (loc2,jpos,iflno),
+ kheadr (loc2,jpos,iflno) )
END IF
C
C* Check for STAT.
C
CALL DM_FKEY ( iflno, 'STAT', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
C
C* Check for COUN.
C
CALL DM_FKEY ( iflno, 'COUN', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
C
C* Check for GPM1 which is the start of three words.
C
CALL DM_FKEY ( iflno, 'GPM1', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
ier = MV_SWP4 ( 3, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
C
C* Check for GVCD. Swap only if the value is greater
C* than the number of standard vertical coordinates.
C
CALL DM_FKEY ( iflno, 'GVCD', type, loc, ier )
IF ( type .eq. 'ROW' ) THEN
IF ( kheadr (loc,jpos,iflno) .gt. nvstd ) THEN
ier = MV_SWP4 ( 1, kheadr (loc,jpos,iflno),
+ kheadr (loc,jpos,iflno) )
END IF
END IF
END IF
C
C* If this is the maximum header defined, save in common.
C
IF ( klstrw ( iflno ) .lt. jpos ) klstrw (iflno) = jpos
END IF
C*
RETURN
END